Can it flatten nested objects?

JSON to CSV / CSV to JSON Converter

Transform JSON arrays into tabular CSV spreadsheets and parse CSVs back into structured JSON.

Zero Server Uploads

Delimiter:

JSON Input

23 lines381 B

[
  {
    "id": 1,
    "name": "Alice Johnson",
    "email": "alice@example.com",
    "role": "Engineer",
    "active": true
  },
  {
    "id": 2,
    "name": "Bob Smith",
    "email": "bob@example.com",
    "role": "Designer",
    "active": false
  },
  {
    "id": 3,
    "name": "Charlie Rose",
    "email": "charlie@example.com",
    "role": "Manager",
    "active": true
  }
]

CSV Output

0 B

Client Memory Engine381 chars

100% Client-Side. No data ever leaves your browser.

Effortless JSON and CSV Data Wrangling

Export database queries and API results directly to CSV for Excel, Google Sheets, or data analysis, or convert customer CSV spreadsheets into clean JSON objects ready for database imports.

Key Highlights & Capabilities

Custom delimiters: Comma, Semicolon, Tab, or Pipe
Automatic flattening of nested JSON objects into dotted columns
Header row auto-generation
High performance on 100,000+ row datasets

Technical Specifications & In-Browser Limits

Execution & Privacy Model

100% in-browser client execution. No server logs, no database storage, and no network transmission of editor content.

Performance & Payload Capacity

Equipped with virtualized gutter windowing. Handles files up to ~25 MB or 400,000 lines smoothly without freezing browser UI.

Frequently Asked Questions

Yes, nested keys like user.address.city will automatically be converted to dot-notation column headers.

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